# ONLINE LESSON PLAN
## Topic: Fun with Mental Maths and Vedic Maths 🧠✨
**Class:** 1
**Subject:** Mathematics
**Duration:** 40–45 minutes
**Mode:** Live online class (Zoom, Google Meet, or another virtual teaching platform)
**Teaching Method:** Interactive screen sharing, visual demonstrations, oral questioning, virtual games, and guided practice.
### Learning Objectives
By the end of the lesson, the student will be able to:
1. Perform simple addition and subtraction mentally.
2. Recognise number combinations that make 10.
3. Use the make-10 strategy to solve addition questions.
4. Use backward counting to solve subtraction questions.
5. Apply mental maths to simple real-life situations.
### Online Teaching Resources
* PowerPoint presentation or interactive slides.
* Digital whiteboard or screen annotation tools.
* Pictures of objects, fruits, toys, and number cards.
* A virtual number line.
* A digital worksheet or PDF shared at the end.
* Chat box or microphone for student responses.
---
# PART 1: WELCOME AND WARM-UP
**Time: 5 minutes**
### Activity: The Mystery Number Box 🎁
**Purpose:** To engage the student and assess their existing number knowledge.
**Teacher's screen:** Display a colourful box containing a question mark, with numbers appearing one at a time.
**Teacher says:**
"Hello, little mathematician! Today, we are going to become Maths Detectives. We will discover some magic number tricks that can help us solve calculations in our minds. Are you ready to solve the mystery numbers?"
### How to Conduct the Activity
Share your screen and display the following questions one by one.
**Question 1:** What number comes after 5?
**Question 2:** What number comes before 9?
**Question 3:** What is 2 + 3?
**Question 4:** What is 5 + 1?
**Question 5:** What is 7 − 2?
Ask the student to answer verbally or type the answer in the chat.
Give positive feedback after each response.
**Teacher transition:**
"Excellent! You already know how to work with numbers. Now, let's discover a trick that can help us add numbers more easily!"
---
# PART 2: CONCEPT 1 — THE MAGIC OF MAKING 10
**Time: 7 minutes**
### Objective
Help the student recognise number pairs that add up to 10.
### Step 1: Explain Using a Visual Slide
Share a slide showing 10 colourful stars.
Next, divide the stars into two groups.
For example:
* 8 yellow stars
* 2 blue stars
Ask:
"How many yellow stars can you see?"
Expected answer: 8.
"How many blue stars can you see?"
Expected answer: 2.
"How many stars are there altogether?"
Expected answer: 10.
Explain:
"When we put 8 and 2 together, we get 10. These numbers are partners because they make 10!"
### Step 2: Show the Magic Number Pairs
Share this table on your screen.
| First Number | Number Partner | Total |
| -----------: | -------------: | ----: |
| 1 | 9 | 10 |
| 2 | 8 | 10 |
| 3 | 7 | 10 |
| 4 | 6 | 10 |
| 5 | 5 | 10 |
| 6 | 4 | 10 |
| 7 | 3 | 10 |
| 8 | 2 | 10 |
| 9 | 1 | 10 |
Explain that the two numbers in each row make 10.
### Step 3: Interactive Online Activity — Complete the Magic Ten
Display one question at a time.
**Question 1:** 6 + ? = 10
Show six stars and four empty spaces.
Ask the student:
"How many more stars do we need to make 10?"
**Question 2:** 8 + ? = 10
Show eight filled circles and two empty circles.
**Question 3:** 3 + ? = 10
Show three coloured blocks and seven empty spaces.
**Question 4:** 9 + ? = 10
Show nine balloons and one empty space.
Let the student answer each question before revealing the correct answer.
**Teacher's explanation:**
"Whenever you know one number, you can think about how many more you need to reach 10. This is a very useful mental maths trick!"
---
# PART 3: CONCEPT 2 — THE MAKE-10 ADDITION TRICK
**Time: 8 minutes**
### Objective
Teach the student to break numbers into smaller parts to make addition easier.
### Step 1: Introduce the Trick
Display this question in large text:
## 8 + 5 = ?
Ask the student to think of the answer.
If the student finds it difficult, say:
"Let's make the calculation easier. We know that 8 needs 2 more to make 10. Can we break 5 into 2 and 3?"
Display the steps one by one.
**Step 1:** Start with 8.
**Step 2:** Break 5 into 2 and 3.
**Step 3:** Add 2 to 8.
8 + 2 = 10
**Step 4:** Add the remaining 3.
10 + 3 = 13
Therefore:
**8 + 5 = 13**
Explain:
"Instead of adding 8 and 5 all at once, we made 10 first. This helped us calculate more easily!"
### Step 2: Demonstrate Another Example
Display:
## 9 + 4 = ?
Ask:
"How many more does 9 need to become 10?"
Expected answer: 1.
Explain that we can break 4 into 1 and 3.
9 + 1 = 10
10 + 3 = 13
Therefore:
**9 + 4 = 13**
### Step 3: Interactive Activity — Help the Number Reach 10
Share a slide containing these questions.
**Challenge 1**
8 + 4 = ?
Ask:
* How much does 8 need to make 10?
* How can we break 4 into two parts?
* What is the final answer?
**Challenge 2**
7 + 5 = ?
Ask:
* How much does 7 need to make 10?
* What remains from 5?
* What is the answer?
**Challenge 3**
9 + 5 = ?
Ask:
* How much does 9 need to make 10?
* What remains from 5?
* What is the answer?
**Answers for the teacher:**
* Challenge 1: 8 + 2 + 2 = 12.
* Challenge 2: 7 + 3 + 2 = 12.
* Challenge 3: 9 + 1 + 4 = 14.
### Online Engagement Tip
Use your digital whiteboard to write each step as the student explains it. You can also reveal one step at a time using PowerPoint animations so the student stays focused on the calculation.
---
# PART 4: CONCEPT 3 — THE BACKWARD COUNTING SUBTRACTION TRICK
**Time: 6 minutes**
### Objective
Help the student understand subtraction through backward counting.
### Step 1: Demonstrate Using a Virtual Number Line
Share a number line from 0 to 20.
Display:
## 10 − 3 = ?
Explain:
"We start at 10. Since we are subtracting 3, we jump backwards three steps."
Demonstrate on the number line:
10 → 9 → 8 → 7
Therefore:
**10 − 3 = 7**
### Step 2: Try Another Example
Display:
## 13 − 4 = ?
Ask the student to identify the starting number.
Expected answer: 13.
Move the pointer backwards four steps:
13 → 12 → 11 → 10 → 9
Therefore:
**13 − 4 = 9**
### Step 3: Interactive Online Game — Where Will the Number Land?
Share the number line and move a digital pointer as the student answers.
**Question 1:** Start at 8. Jump backwards 2 steps.
**Question 2:** Start at 12. Jump backwards 3 steps.
**Question 3:** Start at 15. Jump backwards 5 steps.
**Question 4:** Start at 17. Jump backwards 4 steps.
Ask the student to predict the landing number before moving the pointer.
**Answers:**
1. 6
2. 9
3. 10
4. 13
**Teacher's explanation:**
"Subtraction becomes easier when we know where to start and how many steps to move backwards."
---
# PART 5: VIRTUAL GAME — THE LITTLE NUMBER SHOP
**Time: 6 minutes**
### Objective
Apply mental maths to a simple real-life situation.
### Teacher's Preparation
Share a slide showing a colourful shop with pictures and price tags.
| Item | Price |
| ------------- | ----: |
| 🍎 Apple | ₹4 |
| 🍌 Banana | ₹3 |
| 🧸 Teddy bear | ₹8 |
| 🍫 Chocolate | ₹5 |
| ✏️ Pencil | ₹2 |
Explain:
"Welcome to the Little Number Shop! Today, you are the customer, and I am the shopkeeper. Your job is to calculate the total price in your mind!"
### Challenge 1: Buy Two Fruits
You buy an apple for ₹4 and a banana for ₹3.
Ask:
"How much money do you need altogether?"
Expected answer: ₹7.
### Challenge 2: The Magic Ten Purchase
You buy a teddy bear for ₹8 and a pencil for ₹2.
Ask:
"Can you find the total using our magic number trick?"
Expected answer: ₹10.
Ask the student to explain why 8 and 2 make 10.
### Challenge 3: Money Left Over
You have ₹10 and buy chocolate for ₹5.
Ask:
"How much money will you have left?"
Expected answer: ₹5.
### Challenge 4: A Special Shopping Challenge
You have ₹9 and receive ₹3 more.
Ask:
"How much money do you have now? Can you use the make-10 trick?"
Expected answer: ₹12.
### Challenge 5: Student Becomes the Teacher
Ask the student to choose two items from the shop and calculate the total.
Let the student explain the calculation while you act as the customer.
**Teacher's observation:** Check whether the student can identify the numbers, choose an appropriate strategy, and explain the answer.
---
# PART 6: QUICK MENTAL MATHS CHALLENGE
**Time: 4 minutes**
### Activity: Answer Before the Stars Disappear ⭐
Share one question at a time on your screen.
Give the student approximately 5–10 seconds to think, adjusting the time according to their confidence.
### Round A: Addition
1. 3 + 4 = ?
2. 5 + 5 = ?
3. 8 + 2 = ?
4. 9 + 3 = ?
5. 7 + 5 = ?
### Round B: Subtraction
1. 6 − 2 = ?
2. 10 − 4 = ?
3. 12 − 2 = ?
4. 14 − 4 = ?
5. 15 − 5 = ?
### Round C: Missing Numbers
1. 4 + ___ = 10
2. 7 + ___ = 10
3. 9 + ___ = 10
4. 10 − ___ = 6
5. 10 − ___ = 3
**Answers for the teacher**
Addition: 7, 10, 10, 12, 12.
Subtraction: 4, 6, 10, 10, 10.
Missing numbers: 6, 3, 1, 4, 7.
---
# PART 7: END-OF-LESSON WORKSHEET
**Time: 5 minutes**
Share the worksheet with the student as a PDF or display it on the screen.
Ask the student to solve the questions independently. They may write their answers on paper and show them to you using their camera, or type their answers in the chat.
## WORKSHEET: MY MENTAL MATHS CHALLENGE
**Name:** ____________________
**Class:** 1
**Date:** ____________________
### Part A: Quick Addition
Solve the following.
1. 2 + 4 = ______
2. 3 + 5 = ______
3. 6 + 3 = ______
4. 7 + 3 = ______
5. 8 + 2 = ______
6. 9 + 4 = ______
7. 8 + 5 = ______
8. 7 + 6 = ______
### Part B: Complete the Magic Ten
Fill in the missing numbers.
1. 1 + ______ = 10
2. 3 + ______ = 10
3. 5 + ______ = 10
4. 6 + ______ = 10
5. 8 + ______ = 10
6. 9 + ______ = 10
### Part C: Quick Subtraction
1. 7 − 2 = ______
2. 9 − 3 = ______
3. 10 − 5 = ______
4. 12 − 4 = ______
5. 14 − 4 = ______
6. 15 − 3 = ______
### Part D: Use the Make-10 Trick
Try to make 10 first.
**Example:** 8 + 5 = 8 + 2 + 3 = 13
1. 9 + 3 = ______
2. 8 + 4 = ______
3. 7 + 5 = ______
4. 9 + 5 = ______
### Part E: Solve the Story Problems
**1. The Apple Basket**
There are 6 apples in a basket. Your mother puts 4 more apples into it.
How many apples are there altogether?
Answer: ______ apples.
**2. The Toy Box**
There are 10 toys in a box. You take out 3 toys.
How many toys remain?
Answer: ______ toys.
**3. The Balloon Shop**
You have 8 balloons. Your friend gives you 5 more.
How many balloons do you have now?
Answer: ______ balloons.
**4. The Pencil Box**
You have ₹10. You buy a pencil for ₹2.
How much money is left?
Answer: ₹______.
### Part F: Bonus Challenge ⭐
1. What is double 4? ______
2. What is double 5? ______
3. What number comes after 16? ______
4. What number comes before 12? ______
5. What is 10 + 5? ______
---
# PART 8: WORKSHEET ANSWER KEY
### Part A: Quick Addition
1. 6
2. 8
3. 9
4. 10
5. 10
6. 13
7. 13
8. 13
### Part B: Magic Ten
1. 9
2. 7
3. 5
4. 4
5. 2
6. 1
### Part C: Quick Subtraction
1. 5
2. 6
3. 5
4. 8
5. 10
6. 12
### Part D: Make-10 Trick
1. 12
2. 12
3. 12
4. 14
### Part E: Story Problems
1. 10 apples
2. 7 toys
3. 13 balloons
4. ₹8
### Part F: Bonus Challenge
1. 8
2. 10
3. 17
4. 11
5. 15
---
# PART 9: THREE KEY LEARNINGS
At the end of the online lesson, explain and reinforce these three important takeaways.
### 1. Recognising Number Pairs That Make 10
The student learns that number pairs such as 8 and 2, 7 and 3, and 6 and 4 make 10. This helps develop number sense and makes addition easier.
### 2. Using Mental Strategies for Faster Calculations
The student learns to make 10 first when adding certain numbers and to count backwards when subtracting. These are foundational mental maths strategies that support later learning of Vedic Maths techniques.
### 3. Applying Maths to Everyday Situations
The student practises using addition and subtraction to solve simple shopping, counting, and object-based problems. This builds confidence in applying mathematics beyond the classroom.
---
# PART 10: CLOSING THE ONLINE CLASS
**Teacher says:**
"Fantastic work today! 🎉 You have learnt how to make 10, add numbers using a simple trick, and subtract by counting backwards. You also became a shopkeeper and solved some exciting number challenges!
Before we finish, tell me:
1. What two numbers can you add to make 10?
2. How can making 10 help us add numbers?
3. What can we do when we want to subtract a small number?
Remember, you do not have to rush. Think carefully, look for number patterns, and enjoy solving maths problems. You did a wonderful job today!"
### Suggested Homework
Ask the student to find five examples of addition or subtraction using objects at home, such as pencils, books, or toys.
For example:
* 4 pencils + 3 pencils = 7 pencils.
* 8 toys − 2 toys = 6 toys.
The student can write the questions and answers on paper and share their work during the next online lesson.
